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Kittitas County, WA <br />§ 17A.04.030 CRITICAL AREAS § 17A.04.030 <br />Downloaded from https://ecode360.com/KI6857 on 2025-05-15 <br /> <br /> <br /> <br />and undisturbed condition to ensure that they perform their intended function of protecting the <br />FWHCA. Tree removal is prohibited in RMZs and FWHCA buffers other than in accordance with <br />17A.01.050.3.i & j. <br />6. Standard riparian management zones for waters of the state. <br /> Table 17A.04.030.4 6 Standard RMZ Widths <br />Kittitas County Nonshoreline Rivers, Streams, Lakes and Ponds (does not include building <br />setback [KCC § 17A.01.090.5]) <br />Riparian Management Zone Widths1,2,3 <br /> <br /> <br />Stream Type <br /> <br />Cascade Ecoregion (feet) <br />Agriculture <br />Columbia Plateau Ecoregion <br />(feet) <br />Forest <br />Type S (Shoreline) See the SMP See the SMP <br />Type F 150 1 SPTH from OHWM/CMZ/Floodplain 100 Minimum 100’ <br />Type Np 100 1 SPTH from OHWM/CMZ/Floodplain 65 Minimum 100’ <br />Type Ns 50 100’ 40 <br /> <br /> <br />1 Interrupted RMZs: When a fish and wildlife habitat conservation area RMZ contains an existing <br />legally established public or private road, the Director may allow an alteration or development <br />on the landward side of the road provided that the alteration or development will not have a <br />detrimental impact to the habitat area. The Director may require a habitat management plan if - after <br />considering the hydrologic, geologic, and/or biological habitat connection potential and the extent <br />and permanence of the buffer interruption - such a plan is deemed necessary to confirm the lack of <br />detrimental impact on the habitat area. <br />2 Multiple RMZs or buffers: In the event that RMZs and/or upland habitat buffers for any <br />fish and wildlife habitat conservation area are contiguous or overlapping, the most protective of <br />the collective RMZs shall apply. <br />3The Cascade and Columbia Plateau Ecoregions are derived from the Water Resource Inventory <br />Areas (WRIA) 38, 39, and 40 ecoregion boundaries. The Cascade Ecoregion includes North <br />Cascades, Cascades, and Eastern Cascade Slopes and Foothills ecoregions. The Columbia Plateau <br />Ecoregion includes the shrub-steppe ecoregion known as the Columbia Plateau. Forested ecoregions <br />are well-suited for using SPTH200 consistently to establish RMZ widths, and so for these areas, <br />landowners and land managers can rely on the SPTH200 information provided in WDFW’s SPTH <br />mapping tool. When neither SPTH200 or the extent of the riparian vegetative community is at least <br />100 feet, RMZ shall be a minimum of 100 feet to achieve 95% or more removal efficacy of <br />phosphorus, sediment, and most pesticides consistent with BAS Volume 2, Riparian Ecosystems <br />Management Recommendations, specifically section 2.3.4 Determining RMZ width & section 2.3.5 <br />Width delineation steps. <br />7. Increased RMZs or Upland Habitat Buffers. The Director shall increase the fish and wildlife habitat <br />conservation area RMZ or upland habitat buffer width where the standard RMZ is widths are <br />inadequate to prevent significant adverse environmental impacts or to address hazards associated with <br />the site or the proposed alteration or development or to give special consideration for anadromous <br />fish. The Director may increase the RMZ or upland habitat buffer consistent with BAS. buffer up to a <br />maximum of two times the standard width. The Director shall consider increasing the RMZ or upland <br />habitat buffer when any of the following conditions are present: